Plasma gun nozzle retention ring



FIG. 1 is a perspective view thereof;

FIG. 2 is a front view thereof;

FIG. 3 is a side view thereof; and,

FIG. 4 is a perspective view thereof, showing for illustrative purposes only, the retention ring of FIG. 1 mounted on the nozzle assembly of a plasma gun.

Broken lines shown in the figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a plasma gun nozzle retention ring, as shown and described. 